"It's not cyber war, it's cyber terrorism and I'm afraid it's just the beginning of the game ... I'm afraid it will be the end of the world as we know it," Kaspersky told reporters at a cyber security conference in Tel Aviv.

"I'm scared, believe me," he said.

News of the Flame virus surfaced last week. Researchers said technical evidence suggests it was built for the same nation or nations that commissioned the Stuxnet worm that attacked Iran's nuclear programme in 2010...